Antenna plug



Jan. 5, 1932. P, UBHJER 1,839,381

I ANTENNA PLUG Filed March 6, 1929 l; f7 la ll l @Zw/M,

ATTORNEY Patented Jan. 5, 1932 UNITED STATES PHILIP DUBILIER, OF NEW YORK, N. Y.

ANTENNA PLUG Application filed March 6, `1929. Serial No. 344,795.

This invention relates to antenna plugs for radio receiving sets and more particularly for the type of aerial or antenna which is provided by the wiring of an electric power circuit such as commonly used in dwellings.

In certain dwellings the use of radio receiving sets is ordinarily limited to the impracticability of providing a suitable aerial. In apartment houses, for example, it is inconvenient, and sometimes,prohibited to erect outside aerials, and the common indoor aerial is usually ineffective or limited. due to its small length on the hook-up of the set itself. Consequently, it has been found desirable to make use of the wiring of electric. power circuits in the house for aerials; but the devices heretofore, employed for such a purpose are objectionable in that they are subjected to short-circuits, and also prohibit the use of the electric light socket for other purposes at the same time as it is being used as an aerial.

It is therefore an object of this invention to provide an antenna plug with a plurality of electric connections so that a single electric circuit outlet in a dwelling may be utilized for an aerial and simultaneously permitting the use of the circuit for power and light purposes in the usual manner, and without in anyway interfering with the aerial.

It is a further object to provide a combined electric outlet and antenna plug in one device and to completely house a condenser to isolate it from the outlet connections.

It is a further object of the invention to provide a socket aerial for radio receiving sets Which is simple in structure and not subjected to short-circuits, at the same time having the general appearance of common electric light socket Xtures.

These and other objects are attained by the novel construction, combination and arrangement of parts hereinafter described and shown in the accompanying drawings, constituting a material part of this disclosure, and in which Fig. l is a view of one side ofthe device.

Fig. 2 is a view of another side of the device.

8 and 8 respectively, and the prongs and springs are positioned in compartments formed by the two casing parts .5 and 5, the prongs passing through apertures 9 and9 so that they may be plugged into a base screwed into a lamp socket. The two parts of the casing and the prongs and springs are held in position by a rivet 10 which rigidly binds the lugs 6 and 6 together.

Positioned in a compartment 11 formed by recesses in the lugs 6 and 6 is a small condenser 12 having a copper ribbon connection 13 from one condenser plate to the prong 7, and a similar connection 14 to a brass plug 15 held bythe lugs 6 and 6. The plug 15 has a threaded portion projecting beyond the casing to receive a knurled metal washer 16 and a terminal nut 17 of insulating material, the nut 17 being adapted to securely hold a connection 18 to antenna terminal on a radio receiving set, tightly against the washer 16.

It will be noted that the plug 15 is connected through the condenser 12 to only one of the prongs, that is, to the prong 7, and consequently, regardless of whether the power is on or olf, there is no danger of short-circuits. No power Will be consumed by the connection and the entire length of the wire used in the lighting circuit may be utilized as an aerialfor the receiving set.v It is well known that the use of indoor aerials eliminates, to a large extent, static disturbances, and therefore, the structure above described not only provides a long aerial, but also an aerial greatly freed from static vannoyances, thus making the entire combination superior to the outdoor aerial.

It will be noted that prongs 7 and 7 are directly connected to both terminals of the electrical circuit, thus making it possible to use the circuit for power purposes at the same time as it is being used as an aerial. When it is desired to use the circuit for power, the prongs of a plug connected to an electrical appliance or lamp inserted through the pas sages 19 and 19 formed by the lug 6 and the casing part 5 so that thcy'will contact with the springs 8 and 8. As seen in Fig. 3, power may be taken from either the upper side or the lower side of the device.

The foregoing disclosure is to be regarded as descriptive and illustrative only, and not as restrictive or limitative-of the invention, of which obviously an embodiment may be constructed including many modifications without departing from the general scope here indicated and denoted in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is y l. An electric socket aerial for radio receiving sets, comprising a casing of insulating material having two similar parts, lugs of similaiconstruction projecting from each of the parts, a pair of bow springs positioned in compartments formed in the casing, a pair of prongs attached to the springs, a tin-foil condenser positioned in a compartment formed by recesses in the lugs, a plug held by the lugs and having a threaded portion projecting beyond the casing, a copper ribbon connection from one of the plates of the condenser to one of the prongs, and a similar connection to said plug, the plug being provided with means by which a connection to the antenna terminal of a receiving set may be attached thereto.

2. An electric socket aerial device for radio receiving sets, comprising a two-part casing of insulating material, lugs projecting from each of the casing parts, a pair of bow springs positioned in the casing, a prong connected to each of the springs, a condenser positioned in a compartment formed inthe lugs, a plug held by the lugs and having a portion projecting beyond the casing, a connection from one of the plates of the condenser to one of the prongs, a connectien from the other condenser plate to the plug, and means for connecting the plug to the antenna terminal of a radio receiving set.

3. A n electric socket aerial device for radio receiving sets, comprising a casing of insulating material, a pair of bow springs positioned in the casing, prongs connected at right angles to the springs and passing through apertures in the casing, a condenser positioned in the casing, rearwardl of the prongs, a plug held by the casing, rearward of the condenser, the prongs, condenser and plug being in direct alignment, a connection from the other condenser plate to the plug, and

means for connecting the plug to the antenna terminal of a. recelvmg set.

4. An electric socket aerial device for radio receiving sets, comprising a casing of insulating material, a pair of spring members positioned in the casing, prongs connected to the spring members, a condenser positioned in the casing, parallel to and rearward of the prongs, a connection from one of the condenser plates to one of the prongs, and means rearward of the condenser and in direct alignment therewith and with the prongs for connecting the other condenser plate to the antenna terminal of a radio receiving set.

5. An electric socket aerial device for radio receiving sets, comprising a casing of insulating material, a pair of spring members positioned in the casing, prongs connected to the spring members at right angles thereto and together forming a T, a condenser positioned in the casing, a connection from one of the condenser plates to one of the prongs, means for connecting the other condenser plate to the antenna terminal of a receiving set, and

apertures in the casing at right angles to the prongs to enable the introduction of prongs of a plug connection to electrical appliances so that the electric circuit may be used for power purposes at the same time as it is being used as an aerial.

PHILIP DUBILIER. 

